Valve



March 7', 1933. M .FQ RICHARDSON VALVE Filed Feb'. 25. 1951 2Sheets-Sheet 2 u INVIgNToR.- jmzzreljdzrisar;

BY Y

rroRNEYs v WI TNESSES www Patented Mar. 7, 19.33

4P A'raN'r er1-ica mimica 1'. imuniamsorr,L or BanwrmrENNsYLvANu Ivnr'ms alienation mea February 21s,- 1ss1. sum1 11. 513,136.

This invention relates' generally to valves' '1 of the disc t e and moreparticularlytol a vpumpvalve or use in li' uid or gas compressors andpumps capa le of operating 5 responsively to suction or pressure 'pulsesin opening and closing the valve ports, such type ofv'alve usuallyincludin a guard that v denitely limits movement o the disc element.

1 The primary object of this invention is to equip valves of the' typereferred to with improved guard means' which adjunctively aiord guidancefor -the disc valve to the.

avoidance ofA lcanting or jamming of. the latter during its opening andclosing movements.

- Another object is the. provision of an improved disc valve embodyingnovel st-ruc- Atural features whereby it 4 may be readily zo handledvandinstalled as an assembled unit. A further vobject is the provision of animproved disc valve whichis Simple in construction, o great strength,eiiicient in operation and capableof long usage without 5 necessitatingconstant inspection or renewals.

Other objects and attendant advantages yrelating to structuralrefinements will definitely appear from the detailed description;-

0 while I accomplish such objects and advantages by the means explainedin the follow- .ing specification, shown by the accompanying drawings;and clearly defined inthe subjoined claim. l

- In the drawings:

Fig. I is a top plan view of one practical -form of my improved discvalve.V i

Fig. II is a vertical section of the saine 40,.taken approximately onthev plane indicated bythe arrows 'II-II in Fig I.

Figs. III, IV and V are similar sectional views of slightly diieringembodiments of the present invention.

lg. VI is a central vertical section of .a fuxther' form of my improveddisc valve; an Fig. VII is a sectional view illustrative of the mannerin'which the present invention 50 may be adapted as co-axially arrangedvalves operating in tandem or serial se, quence.

In the several illustrations corresponding parts are, hereinafter,referred to by the same indicating characters; while only those featuresessentially differentiating the various forms will be designated byother characters in order to avoid unnecessary repetitive description. i

Asiillustrated, my improved disc valve 00 comprises a port d seat member1 which is conveniently, although not essentially, provided around theupper marginal portion with a stop rim or flan e 2, serviceable to limitseating of said mem er in the usual partition or partitions that setsapart a valve chest from the pump cylinder.. v This seat member 1 is,usually made a force fit in the partition, but it may bescrew-threaded, as at 3,-Fig. VI, for` corresponding engagement -in thepartition, in an obvious and known manner..

In accordancewith the instant im rovements, I preferably although not aways, provide the seat member 1 with a reduced portion or shoulder 4:around the upper margin, for a purpose4 later on explained.

The valve disc is designated by the numeral 5 and is struckfrom sh'eetmetal either in imperforate 'form as best understood 8' the valvedisc ,5is provided with a central concave-convex portion 8; while in both instances, intermediate the said portion 8 or the aperture 6 and theperipheral'angular turned edge 9, said disc 5 is embossed to form anannular arched ridge 10.

4\To limit movement of the valve disc 5, I make use of an overhangingguard 11 between which and said disc there is interposed a spring 12 incompressiomas shown in Figs. II, IV, V, VI and VII; or, the ping 12 maybe omitted as shown in. Fig. Now it is to be particularly noted that thepresent invention vis mainly directed to the manner and means lwherebythe guard 11 is ,19

constructed and assembled in relation to the valve as a whole. In theforms of my invention shown by Figs. I, II, VI and VII, the guard 11 isformed as an integral component of what I appropriately term acrows-foot or hold-down support, comprehensively designated 18. Thiscrowsfoot or hold-down support 13 conveniently embodies an annularsection 14 with a superposed spider portion 15 and depending legs 16that are suitably finished, on their inner sides, to a tight-press orforced-lit on the marginal seat member shoulder 4, hereinbefore referredto. By the just described itment of the legs 16 to the seat member 1,the whole valve can be handled and installed as a complete assemblage.

In the form of my invention shown in Big. III, the uard 11 is rigidlyattached to the crows-foot 13 by a stud screw l17; while in the formsillustrated by Figs. IV and V said guard is, respectively, secured tothe valve stem 7 and formed as an integral portion thereof, all asreadily understandable by those acquainted with the art to which myinvention appertains. LIn .all cases, however, it is noteworthy that thecrows-foot 13 serves -as a hold-down for the guard 11 against lateraldisplacement by the spring 12, when used. However, to render thehold-down more effective, and to prevent longitudinal displacementthereof, the hub of the crows-foot spider portlon 15 may be extended, asshown at 18 in Fig. VI, for coaction with a suitable abutment such as awall or cover of the valve chest in which 'such valves are located, andas will be obvious without furtherl detailed description. Again, when itis necessary or desirable to arrange valves of the typified 'forms inValigned series or 1n tandem, and make use of.

standard seat members 19 or seats without a said parts. in rigidassembled relation. Furthermore, when the valve discs 5 are of theimperforate type, they are assured great strength and therefore mav bemade of relatively thinner sheet material with incidental reduction inweight.

l In operation, as the Valve disc 5 is subjected to suction from above.or pressure from below, said disc' will-be effectively maintgined,during movement, against tilting by coaction with the crows-foot legs16;

bodying a central concavo-convex dome portion and an annular archedridge, a stationary overhang engageable by said ridge to limit upwardmovement of said element., and a crows-foot hold-down component the legswhereof engage the seat member'v outer edge under forced fit, saidcomponent affording peripheral guidance for the valve element whilesecuring all said Darts in complete assemblv.

In testimony whereof, I have hereunto signed my name at Philadelphia,Pennsylvania, this 20th day of February, 1931.

MAURICE F. RICHARDSON.

marginal shoulder 4, as shown in Fig. VII, v

I conveniently provide the lower Valve crows-foot 13 with a tubularcentral part 20, suitably threaded internally for reception of a studscrew 21 against the head 22 whereof, the extended stem 23 of thesuperjacent valve assemblage abuts. It will now be self-evident that byclamping down the upoer crows-foot 13 to its seat member 19, as by meansconventionally indicated at 24; the lower crows-foot 13 may be in likemanner similarly clamped down to its seat me'mber 19 by manipulation ofthe stud screw 21 in an obvious manner.

Attention is also directed to the fact that the Valve discs 5 are guidedduring opening and closing movements by the legs 16 of the crows-footdevices 13, whether or not they are perforated for co-action with avalvestem 7 also that the'valve stem 7 may be fitted with a sleeve 25, Figs.V and VII, effective to space the guard 11 relative to the valve seat 1or 19 while aiding to secure

